Magnets and Magnetism


by B4ssHunter
Tags: magnetism, magnets
B4ssHunter
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#1
Sep13-13, 04:13 AM
P: 178
i am very confused by the idea of magnets
how do magnets attract things ? and if they do attract things , then what is the importance of flux lines ?
i mean , shouldn't magnets just align things to the flux lines in the direction of the north pole ?
i want to know how magnets work in principle , down to the electron level , so if there is any video , website , book or even a useful comment please share it with me * in layman high school terms please *
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quawa99
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#2
Sep13-13, 04:22 AM
P: 56
You will need to understand the what electromagnetism is to fully understand how magnets work.Electromagnetism by itself is a very huge topic by the way but its one of the most interesting topics in physics ,so i would recommend you to first read about electromagnetism and then approach your question.
Drakkith
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#3
Sep13-13, 04:24 AM
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Quote Quote by B4ssHunter View Post
i am very confused by the idea of magnets
how do magnets attract things ? and if they do attract things , then what is the importance of flux lines ?
i mean , shouldn't magnets just align things to the flux lines in the direction of the north pole ?
i want to know how magnets work in principle , down to the electron level , so if there is any video , website , book or even a useful comment please share it with me * in layman high school terms please *
This is a long, long road. Here's a few articles to get you started.

http://en.wikipedia.org/wiki/Electromagnetism
http://en.wikipedia.org/wiki/History...agnetic_theory
http://en.wikipedia.org/wiki/Magnetism

(It's okay if you don't understand some of it. Just keep reading and it will make more sense over time)

B4ssHunter
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#4
Sep13-13, 04:32 AM
P: 178

Magnets and Magnetism


okay thanks alot , also could you recommend me a book about electromagnetism , something that goes from scratch ?
also , it would be really REALLY helpful , if someone gives me an idea of electromagnetism , just a basic roundup about why do magnets attract magnetic bodies , i understand the idea of paired and unpaired electrons , so is it just electric attraction between unpaired electrons of the magnet and those of the attracted bodies ?
Drakkith
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#5
Sep13-13, 04:37 AM
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Quote Quote by B4ssHunter View Post
, i understand the idea of paired and unpaired electrons , so is it just electric attraction between unpaired electrons of the magnet and those of the attracted bodies ?
No, it is the result of the magnetic field of these electrons adding together. (At least in a permanent magnet. Electromagnets are different) This magnetic field comes from the fact that the electrons have intrinsic "spin". (Kind of like they are spinning around an axis, but not quite. It's a quantum mechanical effect with no classical analogue)
B4ssHunter
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#6
Sep13-13, 04:59 AM
P: 178
Quote Quote by Drakkith View Post
No, it is the result of the magnetic field of these electrons adding together. (At least in a permanent magnet. Electromagnets are different) This magnetic field comes from the fact that the electrons have intrinsic "spin". (Kind of like they are spinning around an axis, but not quite. It's a quantum mechanical effect with no classical analogue)
so do attracted objects like to be in the nearest flux line to the magnet ? that would explain the attraction right ?
Drakkith
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#7
Sep13-13, 05:01 AM
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Quote Quote by B4ssHunter View Post
so do attracted objects like to be in the nearest flux line to the magnet ? that would explain the attraction right ?
Flux lines (aka field lines) aren't real. They are representations of the magnetic field that make it easier to visualize.

From wiki:

A field line is a locus that is defined by a vector field and a starting location within the field. Field lines are useful for visualizing vector fields, which are otherwise hard to depict. Note that, like longitude and latitude lines on a globe, or topographic lines on a topographic map, these lines are not physical lines that are actually present at certain locations; they are merely visualization tools.
B4ssHunter
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#8
Sep13-13, 05:23 AM
P: 178
Quote Quote by Drakkith View Post
Flux lines (aka field lines) aren't real. They are representations of the magnetic field that make it easier to visualize.

From wiki:

A field line is a locus that is defined by a vector field and a starting location within the field. Field lines are useful for visualizing vector fields, which are otherwise hard to depict. Note that, like longitude and latitude lines on a globe, or topographic lines on a topographic map, these lines are not physical lines that are actually present at certain locations; they are merely visualization tools.
aha , would you still recommend any good book ?
Drakkith
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#9
Sep13-13, 05:25 AM
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Quote Quote by B4ssHunter View Post
aha , would you still recommend any good book ?
Can't say I do. I'm an internet kind of guy for the most part. Most of what you want to know can be found on wikipedia or similar sites, honestly. If you want to actually learn the math and the in depth theory then you'll have to get a textbook or take some classes.


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